Api.php

<?php
  /**
   *
   */
  class Api extends REST_Controller{

    public function index(){
      $this->load->view('json');
    }

    public function login(){
      $this->form_validation->set_rules('username','username', 'required|max_length[256]');
      $this->form_validation->set_rules('password','password', 'required|min_length[2]|max_length[256]');
      return Validation::validate($this,'','',function($token,$output){
        $username = $this->input->post('username');
        $password = $this->input->post('password');
        $id = $this->M_api->login($username, $password);
        if ($id != false) {
          $token = array();
          $token['id'] = $id;
          $output['status'] = true;
          $output['username'] = $username;
          $output['token'] = JWT::encode($token, $this->config->item('jwt_key'));
        }else{
          $output['errors'] = '{"type":"invalid"}';
        }
        return $output;
      });
    }

    public function list_produk(){
     return Validation::validate($this, 'user', 'read', function($token, $output){
       $list = $this->M_api->get_list_produk();
       foreach($list->result() as $data) {
         $output[] = array('id_produk' => $data->id_produk,
           'nama' => $data->nama,
           'deskripsi' => $data->deskripsi,
           'harga' => $data->harga,
           'gambar' => $data->gambar
           );
         $output['status'] = true;
       }
       return $output;
     });
   }

   public function detail_produk()
   {
     $this->form_validation->set_rules('id_produk', 'id_produk', 'required|max_length[256]');
     return Validation::validate($this, 'user', 'read', function($token, $output)
     {
       $detail = $this->M_api->detail_produk($this->input->post('id_produk'));
       foreach($detail->result() as $data)
       {
         $output = array('id_produk' => $data->id_produk,
           'nama' => $data->nama,
           'deskripsi' => $data->deskripsi,
           'harga' => $data->harga,
           'gambar' => $data->gambar
           );
         $output['status'] = true;
       }
       return $output;
     });
   }

   public function transaksi()
   {
     $this->form_validation->set_rules('order', 'order', 'required');
     return Validation::validate($this, 'user', 'read', function($token, $output)
     {
       $parse = json_decode($this->input->post('order',true),true);
       $id_user = $parse[0]['id_user'];
       $lokasi = $parse[0]['lokasi'];
       $alamat = $parse[0]['alamat'];
       $detail = $parse[0]['myorder'];
       $total = $detail['total'];

 //insert tabel transaksi
       $insert_trans = array('tanggal' => date('Y-m-d'),
         'id_user' => $id_user,
         'total' => $total,
         'lokasi' => $lokasi,
         'alamat' => $alamat
         );

       $this->db->insert('transaksi',$insert_trans);
       $id_transaksi = $this->db->insert_id();

       foreach ($detail['detail'] as $data) {
         $nama[] = $data['nama'];
         $id_produk[] = $data['id_menu'];
         $qty[] = $data['qty'];
         $insert_det = array('id_transaksi' => $id_transaksi,
           'id_produk' => $data['id_menu'],
           'qty' => $data['qty'],
           );
         $this->db->insert('detail_transaksi',$insert_det);
       }
       $output['pesan'] = "berhasil";
       $output['status'] = true;
       return $output;
     });
   }

 }
?>